138786430251 has 32 divisors (see below), whose sum is σ = 218511462400. Its totient is φ = 76676077440.

The previous prime is 138786430231. The next prime is 138786430309. The reversal of 138786430251 is 152034687831.

It is not a de Polignac number, because 138786430251 - 2¹⁰ = 138786429227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138786430251.

It is not an unprimeable number, because it can be changed into a prime (138786430231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 596205 + ... + 795633.

It is an arithmetic number, because the mean of its divisors is an integer number (6828483200).

Almost surely, 2^138786430251 is an apocalyptic number.

138786430251 is a deficient number, since it is larger than the sum of its proper divisors (79725032149).

138786430251 is a wasteful number, since it uses less digits than its factorization.

138786430251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200539.

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 138786430251 in words is "one hundred thirty-eight billion, seven hundred eighty-six million, four hundred thirty thousand, two hundred fifty-one".